Locomotive driving box



Sept. 25, 1928.

J. G. BLUNT LOCOMOTIVE DRIVING BOX hm. ...ml

lPatented Sept. 25, 1928.

Loconorrvn matas GL Bin-ltr, or scHnNnc'rAnY, New Yoan.

res-,zia

sica

nitrvrne Box.

Application sied september 17,1926: serial ne. 136,059.

My invention more particularly relates to locomotive driving boxes of the general class 'or type in which an increase of journal bearing surface is attained j by the appli-cation 1 of supplemental bearings, fitted in the driving box below the. crown brass thereof,'and is an improvement upon that -set forth in Let- 'ters Patent of the United States No.1,551,496,

granted and issued to me runder date of August 25, 1925.

The object of my present invention. is to provide a lubricant cellar, ofimproved construction, which will be readily insertable in, and removable from, a locomotive driving 5 box, and' which, when in operative position, in addition to acting as a lubricant container, and a strut or spreader to 'hold the driving box'from closing in on the journal, will,

serve, `in cooperationA with the usual wedges, 9*) asa direct supportv for the supplemental bearings. A further object of myfinvention is to provide improved means for adjustingA j the cellar, so as to adjustthe supplemental bearings to take up wear on the crown'brass. The improvement claimed is hereinafter fully set forth. j j

- In service, there is atendency for the main driving boxesto lift from their journals a condition which is met by supplemental bearings, located below the horizontal central plane of the journals, and having a slight clearance away from the surfaces of the journal, the amount of such clearance forming the limit of the possible rise of the-boxes. Prolonged service causes wear of the crown bearings, inasmuch as the superposed load on the journals is on their vertical centralline, and, in order to prevent the boxes from rising from their journals, after the crown bearings have become worn, it is necessary that themeans employed to prevent the rising of the boxes, shall be adjustable throughout the allowable degree of crown bearing wear. Y

The application of supplemental bearings in locomotives has been found, in practice, to retard the wear of the crown bearings, and my invention is designed to provide for simple and convenient construction, installation, and adjustment of such supplemental Vbearings for all classesof locomotive driving boxes, In the accompanying drawing: Figure 1 is a front view, in elevation, of a driving box, illustrating an embodiment vof my invention; Fig. 2, a vertical longitudinal section, on the line La of Fig. 1 Fig. 8, a vertical -longitudinal section, onthe line a b' of F 1; Fig. 4;, a view, in perspective,of the driving box,l with thevcellar removed;'F ig. 5, a similar. view of the lubricant cellar; and, Fig. 6, ay similar view, of one of the bars for supporting and adjusting the cellar.

In the practice of invention, referring `descriptively to the specific embodiment thereof which herein exemplified, the drivy ing box, 10, is provided with a crown brass, 11, and with supplemental bearings, 12, fitted in it below the crown brass. The portions, 13, of the bottoms Aof the supplemental bear# ings which adjoin the journals, are flat, and the remainder of the bottoms is formed with two oppositely inclined faces,f1l', 15, whichV are superposed upon similarly inclined faces, on theV adjusting wedges, 18 and 19, respectively. The bottoms .of the wedges are in-- elined laterally, in correspondence with laterally inclined grooves, 20, 'of'.thedriving Y box, in lwhich they fit. A bolt, 21, is formed on eachV ofthe adjusting wedges, 18,y said.

bolts passing freely through the wedges,f19,`

and being threaded at their outer extremities for the engagem'entjof n'uts, 21a-,1l bearing againstthe outer ends of the wedges, 19:

In order to elevate the supplemental bear ings for the purpose of taking up wear, the nuts, 21a, are tightened, thereby drawing the adjusting wedges together, and raising the Vsupplemental bearing byl their action thereon, until the supplemental bearings are brought into loose contact with the journal.l `Additional elevation of the supplemental bearings, to take up wear on the crown brass, may be ei'ected'by removing y.the requiredV amount of metal fromtheir top faces.

The lubricant cellar, indicated as a whole by the letter c, is preferably formed as an integral casting, and comprisesa front wall, 24, a rearpwall, 25, two side walls, 26, and f a bottom wall, 27, having shoulders', 28, which extend beyond each of the sidewalls, to provide abutments adapted to prevent the box from closing in on the journal. The outer face of each of the side walls is formedl with a shoulder, 29, having a flat upper face, which` extends longitudinally of the wall, from endv to end thereof, and is disposed a short distance below the top ofthe wall. The upperffaces of the shoulders, `29, abut Vthe under faces, 13,', of the supplemental bearings, and cooperate with the wedges to support the supplemental. bearingsVV in proper `rectly support the inner portions, 13,

adjusted position with relation to the crown Vthe box, a recess, 30, adapted to receive the T head, and a portion of the shank, ot a bolt, 31, on the bottom oi' thedrivingbox, at each end whereof there is a bar, which extends from leg to leg of the box, and is secured, at each end, to one ofthe legs, by one of the bolts, 31,-and a nut, Bla. j Each bar is formed with two bosses, 34, adapted to tit between the legs of the box, and support the cellar,r so that when the nuts, 31, are tightened, the cellar Will be elevated, thus elevating the shoulders, 29, to the proper positionto diof the lower faces of the supplemental bearings.

In practice, when it is desired to elevate the supplemental Y bearings, their tops aie cut away the proper amount, and then the nuts, 2l, of the Wedge bolts, are tightened, causing the Wedges to raise the supplemental bearings' into contact with the bottom faces of the crown brass. The nuts, 31a, are then tightened, to raise the cellar, `and thus bring the shoulders, 29, of the cellar, into properl Vposition to act as a' direct support for the inner portions, 130'the bottom faces of the supplemental bearings.

k'While the lubricant cellar has been described as an integral casting, it is to be understood that4 the construction may be varied. Thus, for example, the end Vplate of the cellar may springs employed to hold the end plate normally shut. j j

be `hinged thereto, and i ing the lubricant cellar;

I claim as my'invention and desire to secure by Letters Patent:

rihe combination of a locomotive driving box having a Vrecess in the inner side `face or each of its side walls; a crown brass kings, and adjustable longitudinally to exert bearing thereon; a lubricantv cellar, comprising a shoulder on each otits directly supporting a portion of acting as a spreader for the box; and

ymeans 'for adjusting'said cellar to etect adr justmcnt of said. shoulders to various supporting positions.

2. The combination of a locomotive driving box, having a recess in the inner face.

ofgeach of its side Walls; a crown brass fitted in the box; a .supplemental bearing iitted in each of the recesses, and supporting the crown brass; a Wedge fitted in each recess,

*below the suaalemental'bearind alordin@ C? 23 partial support for the bearing, and adapted to e'liiect vertical adjustment thereof; a lubricant cellar, having means affording partial support for each of the supplementalbearbottoms adapted 'for abut- ,Y

side Walls for Y the bottoms oli' the supplemental bearings, and means-55 ings, said cellar being adapted'for adjustment to e'lect vertical adjustment of the bearings; and means for vertically adjust- JAMES G. BLUNT. 

